"Just look at sports," Paisley, 40, interjected. "I can't keep track of all these trades." After Underwood pointed out that quarterback Tim Tebow now plays for the New York Jets, the conversation shifted to Swift's love life.

"The greatest trade of the year had to be the Kennedy family. They somehow traded Arnold Schwarzenegger for Taylor Swift," Paisley deadpanned. "I mean, what they got for that ..." (Conor, 18, is the 65-year-old bodybuilder's nephew through marriage.)

Intentional or no, the cameras did not capture Swift's reaction. Instead, Underwood stopped Paisley mid-sentence and pretended to whisper new information about the 22-year-old's breakup in his ear. "What? Why don't I ever hear about these things?" Paisley asked. "I'm the last one to know."

"I'm going to love you forever, or 72 days Amen, as long as Justin Bieber is not a conceiver, as long as Taylor Swift is with her current boyfriend," the trio sang. "I'm going to love you for 20 million dollars, for a hit TV series or pics in Us Weekly, for 72 Days, Amen."